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以两优培九为试验材料 ,分析了不同氮肥用量 (纯N 0kg/hm2 、112 5kg/hm2 、2 2 5 0kg/hm2 、337 5kg/hm2 )和栽插密度 (每公顷 2 2 5× 10 4 穴、2 7 0× 10 4 穴、31 5× 10 4 穴 )对其产量及产量结构的影响。栽插密度对两优培九结实率和千粒重影响较小 ,对单位面积穗数和每穗粒数影响较大 ,且在每公顷 2 2 5× 10 4 ～ 31 5× 10 4 穴的密度范围内 ,产量差异未达显著水平 ;氮肥用量对每穗粒数影响较小 ,对穗数、结实率和千粒重影响较大 ,纯N水平为337 5kg/hm2 时 ,增穗作用不仅不显著 ,反而极显著降低结实率和千粒重。试验结果表明 :在中等肥力土壤中 ,施纯N 2 2 5 0kg/hm2 ,栽插密度每公顷在 2 7 0× 10 4 穴以内 ,高等肥力田每公顷掌握在 2 2 5× 10 4 穴左右 ,有利于协调该组合的穗数、每穗粒数、结实率和千粒重的关系 ,获得高产。
Taking Liangyoupeijiu as test material, the effects of different nitrogen fertilizer dosage (pure N 0kg / hm2, 112 5kg / hm2, 2250kg / hm2, 337 5kg / hm2) and planting density (2 2 5 × 10 4, 2 70 × 10 4 holes, 31 5 × 10 4 holes) on its yield and yield structure. The transplanting density had little effect on the seed setting rate and 1000-grain weight of Liangyoupeijiu, and had a great influence on the spike number per panicle and grain number per spike. In the density range of 2 2 5 × 10 4 ~ 31 5 × 10 4 per hectare, the yield The difference was not significant. The effect of nitrogen fertilizer on spikelets per spike was less, and the spike number, seed setting rate and 1000-grain weight were more significant. When the pure N level was 337.5kg / hm2, the spike-enhancing effect was not only insignificant, Seed setting rate and 1000-grain weight. The results showed that in medium fertility soils, N 2 25 0 kg / hm 2 was applied at pure planting density of 2 710 × 10 4 per hectare and that of high fertility field was about 2 2 5 × 10 4 per hectare , Which is conducive to the coordination of the combination of panicle number, grain number per spike, seed setting rate and 1000-grain weight, yielding high yield.